<svg xmlns="http://www.w3.org/2000/svg">
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    <g>
      <rect width="15px" height="15px"/>
    </g>
    <g transform="translate(50,0)">
      <rect x="0" y="10" width="15px" height="15px"/>
    </g>
    <g transform="translate(100,0)">
      <rect x="9" y="10" width="15px" height="15px"/>
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  <!-- Second row -->
  <g transform="translate(20,70)">
    <g>
      <rect x="22.5" y="10" width="15px" height="15px"/>
    </g>
    <g transform="translate(50,0)">
      <rect x="29.7" y="10" width="15px" height="15px"/>
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    <g transform="translate(100,0)">
      <rect x="45" y="30"  width="15px" height="15px"/>
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  </g>
  <!-- Third row -->
  <g transform="translate(20,120)">
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    <g transform="translate(100,0)">
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  </g>
</svg>
